It is described a mobile network with a first network node and a second network node, the mobile network providing a user plane for transporting transmission packets, which contain user data, and a further network layer plane different from the user plane. A method of operating the first network node includes sending an information element to the second network node via a network layer protocol of the further network layer plane wherein the information element indicates optimizing capabilities of the first network node or of a other network node of the mobile network of processing an optimized transmission packet. A method of operating a second network node includes receiving the information element from the first network node via a network layer protocol of the further network layer plane, and processing the information element.